10段PHP常用功能代码(1)(2)

//this is a sample xml string
$xml_string="﹤?xml version='1.0'?﹥
﹤moleculedb﹥
    ﹤molecule name='Benzine'﹥
        ﹤symbol﹥ben﹤/symbol﹥
        ﹤code﹥A﹤/code﹥
    ﹤/molecule﹥
    ﹤molecule name='Water'﹥
        ﹤symbol﹥h2o﹤/symbol﹥
        ﹤code﹥K﹤/code﹥
    ﹤/molecule﹥
﹤/moleculedb﹥";

//load the xml string using simplexml function
$xml = simplexml_load_string($xml_string);

//loop through the each node of molecule
foreach ($xml-﹥molecule as $record)
{
   //attribute are accessted by
   echo $record['name'], '  ';
   //node are accessted by -﹥ operator
   echo $record-﹥symbol, '  ';
   echo $record-﹥code, '﹤br /﹥';
}

﹤?php
if(basename(__FILE__) == basename($_SERVER['PHP_SELF'])) send_404();
$dbHost = "localhost";        //Location Of Database usually its localhost
$dbUser = "xxxx";            //Database User Name
$dbPass = "xxxx";            //Database Password
$dbDatabase = "xxxx";       //Database Name

$db = mysql_connect("$dbHost", "$dbUser", "$dbPass") or 
                                   die ("Error connecting to database.");
mysql_select_db("$dbDatabase", $db) or die ("Couldn't select the database.");

# This function will send an imitation 404 page if the user
# types in this files filename into the address bar.
# only files connecting with in the same directory as this
# file will be able to use it as well.
function send_404()
{
    header('HTTP/1.x 404 Not Found');
    print '﹤!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"﹥'."n".
    '﹤html﹥﹤head﹥'."n".
    '﹤title﹥404 Not Found﹤/title﹥'."n".
    '﹤/head﹥﹤body﹥'."n".
    '﹤h1﹥Not Found﹤/h1﹥'."n".
    '﹤p﹥The requested URL '.
    str_replace(strstr($_SERVER['REQUEST_URI'], '?'), '', $_SERVER['REQUEST_URI']).
    ' was not found on this server.﹤/p﹥'."n".
    '﹤/body﹥﹤/html﹥'."n";
    exit;
}

# In any file you want to connect to the database,
# and in this case we will name this file db.php
# just add this line of php code (without the pound sign):
# include"db.php";
?﹥

$json_data = array ('id'=﹥1,'name'=﹥"rolf",'country'=﹥'russia',
"office"=﹥array("google","oracle"));
echo json_encode($json_data);

$query = "select UNIX_TIMESTAMP(date_field) as mydate 
    from mytable where 1=1";
$records = mysql_query($query) or die(mysql_error());
while($row = mysql_fetch_array($records))
{
echo $row;
} 

﹤?php
    function unzip($location,$newLocation){
        if(exec("unzip $location",$arr)){
            mkdir($newLocation);
            for($i = 1;$i﹤ count($arr);$i++){
                $file = trim(preg_replace("~inflating: ~","",$arr[$i]));
                copy($location.'/'.$file,$newLocation.'/'.$file);
                unlink($location.'/'.$file);
            }
            return TRUE;
        }else{
            return FALSE;
        }
    }
?﹥
//Use the code as following:
﹤?php
include 'functions.php';
if(unzip('zipedfiles/test.zip','unziped/myNewZip'))
    echo 'Success!';
else
    echo 'Error';
?﹥